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24
4
我有一个复杂的 SQL，如下所示。我正在寻找一个 python (3+) 库，它可以提取 from 子句中包含的表名。我正在映射客户的数据库、 View 和报告，并且有几十个查询要映射，因此需要自动化这项工作。
已经看过 Python-sqlparse 和 sqlparse，但我不确定它们是否能胜任这项任务，我正在努力避免学习曲线。
SELECT --Locais Disponíveis para Abertura de Ordens de corte
COALESCE(a."Chave", b."Chave") AS "Chave",
COALESCE(a."Unidade", b."Unidade") AS "Unidade",
COALESCE(a."Fazenda", b."Fazenda") AS "Fazenda",
COALESCE(a."Talhao", b."Talhao") AS "Talhao",
COALESCE(a."Participacao", b."Participacao") AS "Participacao",
CASE
WHEN a."Condicao" = 'Disponível Parcial (Moagem)' AND
b."Condicao" = 'Disponível Parcial (Mudas)' THEN
'Disponível (Safra+Mudas)'
ELSE
COALESCE(a."Condicao", b."Condicao")
END AS "Condicao",
COALESCE(a."Estagio", b."Estagio") AS "Estagio",
COALESCE(a."Variedade", b."Variedade") AS "Variedade",
COALESCE(a."Ciclo Maturacao", b."Ciclo Maturacao") AS "Ciclo Maturacao",
COALESCE(a."Propriedade", b."Propriedade") AS "Propriedade",
COALESCE(a."Proprietario", b."Proprietario") AS "Proprietario",
COALESCE(a."No. Corte", b."No. Corte") AS "No. Corte",
(CASE
WHEN a."Area" IS NULL THEN
0
ELSE
a."Area"
END + CASE
WHEN b."Area" IS NULL THEN
0
ELSE
b."Area"
END) AS "Area",
CASE
WHEN a."Condicao" = 'Disponível Parcial (Moagem)' AND
b."Condicao" = 'Disponível Parcial (Mudas)' THEN
((CASE
WHEN a."Area" IS NULL THEN
0
ELSE
a."Area"
END + CASE
WHEN b."Area" IS NULL THEN
0
ELSE
b."Area"
END) * a."TCH")
ELSE
a."Toneladas"
END AS "Toneladas",
a."TCH",
COALESCE(a."Distancia", b."Distancia") AS "Distancia"
FROM (SELECT --Disponibilidade (Moagem)
A.*,
a."Area" * b."TCH" AS "Toneladas",
b."TCH" AS "TCH",
c."Dist. Terra" + c."Dist. Asfalto" AS "Distancia"
FROM ((SELECT --ÁREAS DISPONÍVEIS PARA ABERTURA DE ORDEM CORTE DE SAFRA
a."Fazenda" * 1000 + a."Talhao" AS "Chave",
CASE
WHEN a."Unidade" = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
a."Fazenda",
a."Talhao",
a."Participacao",
CASE
WHEN a."Ocorrencia Cadastro" = 'C' THEN
'Disponível Total (Moagem)'
ELSE
'Disponível Parcial (Moagem)'
END AS "Condicao",
a."Estagio",
a."Variedade",
a."Ciclo Maturacao",
a."Propriedade",
a."Proprietario",
a."No. Corte",
(a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) AS "Area"
FROM (SELECT --ULTIMA ESTIMATIVA DO TALHAO A
OBJ.CD_UNID_IND AS "Unidade",
OBJ.CD_UPNIVEL1 AS "Fazenda",
OBJ.CD_UPNIVEL3 AS "Talhao",
OBJ.CD_UPNIVEL1 || ' - ' || F.DE_UPNIVEL1 AS "Propriedade",
G.DE_FORNEC AS "Proprietario",
CASE
WHEN UP3.CD_TP_PROPR IN (1, 2, 3, 11) THEN
'Parceria'
WHEN UP3.CD_TP_PROPR IN (5, 8) THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 6 THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 14 THEN
'Parceria'
ELSE
'Verificar'
END AS "Participacao",
C.FG_OCORREN AS "Ocorrencia Cadastro",
C.DT_OCORREN AS "Data Ocorrencia",
B.DA_ESTAGIO AS "Estagio",
B.NO_CORTE AS "No. Corte",
D.DE_VARIED AS "Variedade",
E.DE_MATURAC AS "Ciclo Maturacao",
(OBJ.QT_AREA_PROD * 1) AS "Area",
(OBJ.QT_CANA_ENTR / 1000) AS "Toneladas"
FROM PIMSCS.HISTPREPRO OBJ,
PIMSCS.ESTAGIOS B,
PIMSCS.UPNIVEL3 UP3,
PIMSCS.SAFRUPNIV3 C,
PIMSCS.VARIEDADES D,
PIMSCS.TIPO_MATURAC E,
PIMSCS.UPNIVEL1 F,
PIMSCS.FORNECS G
WHERE OBJ.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND OBJ.CD_UNID_IND IN (15, 19)
AND OBJ.CD_ESTAGIO = B.CD_ESTAGIO
AND OBJ.CD_UPNIVEL1 = UP3.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = UP3.CD_UPNIVEL3
AND OBJ.CD_SAFRA = UP3.CD_SAFRA
AND OBJ.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND OBJ.CD_SAFRA = C.CD_SAFRA
AND UP3.CD_VARIED = D.CD_VARIED
AND E.FG_MATURAC = D.FG_MATURAC
AND OBJ.CD_UPNIVEL1 = F.CD_UPNIVEL1
AND F.CD_FORNEC = G.CD_FORNEC
AND C.DT_OCORREN =
(SELECT MAX(D.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 D
WHERE D.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND D.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND D.CD_SAFRA = C.CD_SAFRA)
AND OBJ.CD_HIST =
(SELECT OBJ2.CD_HIST
FROM PIMSCS.HISTPREPRO OBJ2
WHERE OBJ2.CD_UPNIVEL1 = OBJ.CD_UPNIVEL1
AND OBJ2.CD_UPNIVEL3 = OBJ.CD_UPNIVEL3
AND OBJ2.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ2.CD_HIST NOT IN ('E', 'S')
AND OBJ2.CD_EMPRESA IN (15, 19)
AND OBJ2.DT_HISTORICO =
(SELECT MAX(OBJ3.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO OBJ3
WHERE OBJ3.CD_UPNIVEL1 =
OBJ.CD_UPNIVEL1
AND OBJ3.CD_UPNIVEL3 =
OBJ.CD_UPNIVEL3
AND OBJ3.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ3.CD_HIST NOT IN ('E', 'S')
AND OBJ3.CD_EMPRESA IN (15, 19)))) A,
(SELECT --ÁREA DE ORDEM DE CORTE DE SAFRA FECHADA B
QD.CD_UPNIVEL1 AS "Fazenda",
QD.CD_UPNIVEL3 AS "Talhao",
SUM(QD.QT_AREA) AS "Area Fechada"
FROM PIMSCS.QUEIMA_HE QH, PIMSCS.QUEIMA_DE QD
WHERE QH.NO_QUEIMA = QD.NO_QUEIMA
AND QD.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
GROUP BY QD.CD_UPNIVEL1, QD.CD_UPNIVEL3) B
WHERE a."Fazenda" = b."Fazenda"(+)
AND a."Talhao" = b."Talhao"(+)
AND a."Ocorrencia Cadastro" <> 'F'
AND (a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) > 0)) A
LEFT JOIN (SELECT --Ultima Estimativa do Talhão
A.CD_HIST "Cod. Historico",
CASE
WHEN A.CD_UNID_IND = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
A.DT_HISTORICO AS "Data",
A.QT_AREA_PROD AS "Area",
(A.QT_CANA_ENTR / 1000) AS "Toneladas",
A.QT_TCH AS "TCH"
FROM PIMSCS.HISTPREPRO A
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND A.CD_HIST NOT IN ('E', 'S')
AND A.QT_AREA_PROD <> 0
AND A.DT_HISTORICO =
(SELECT MAX(A2.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO A2
WHERE A.CD_SAFRA = A2.CD_SAFRA
AND A.CD_UPNIVEL2 = A2.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = A2.CD_UPNIVEL3
AND A2.CD_HIST NOT IN ('E', 'S'))) B
ON a."Fazenda" = b."Zona"
AND a."Talhao" = b."Talhao"
LEFT JOIN (SELECT --Distancia Cadastrada
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
MAX(A.DS_TERRA) AS "Dist. Terra",
MAX(A.DS_ASFALTO) AS "Dist. Asfalto"
FROM PIMSCS.UPNIVEL3 A
LEFT JOIN PIMSCS.SAFRUPNIV3 B
ON A.CD_SAFRA = B.CD_SAFRA
AND A.CD_UPNIVEL1 = B.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = B.CD_UPNIVEL3
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_OCUP = 1
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.FG_OCORREN <> 'I'
AND B.DT_OCORREN =
(SELECT MAX(B2.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 B2
WHERE B.CD_SAFRA = B2.CD_SAFRA
AND B.CD_UPNIVEL1 = B2.CD_UPNIVEL1
AND B.CD_UPNIVEL3 = B2.CD_UPNIVEL3)
GROUP BY A.CD_UPNIVEL1, A.CD_UPNIVEL3) C
ON a."Fazenda" = c."Zona"
AND a."Talhao" = c."Talhao") A
FULL JOIN (SELECT --Disponibilidade (Mudas)
A.*,
a."Area" * b."TCH" AS "Toneladas",
b."TCH" AS "TCH",
c."Dist. Terra" + c."Dist. Asfalto" AS "Distancia"
FROM ((SELECT --ÁREAS DISPONÍVEIS PARA ABERTURA DE ORDEM CORTE DE SAFRA
a."Fazenda" * 1000 + a."Talhao" AS "Chave",
CASE
WHEN a."Unidade" = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
a."Fazenda",
a."Talhao",
a."Participacao",
CASE
WHEN a."Ocorrencia Cadastro" = 'C' THEN
'Disponível Total (Mudas)'
ELSE
'Disponível Parcial (Mudas)'
END AS "Condicao",
a."Estagio",
a."Variedade",
a."Ciclo Maturacao",
a."Propriedade",
a."Proprietario",
a."No. Corte",
(a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) AS "Area"
FROM (SELECT --ULTIMA ESTIMATIVA DO TALHAO A
OBJ.CD_UNID_IND AS "Unidade",
OBJ.CD_UPNIVEL1 AS "Fazenda",
OBJ.CD_UPNIVEL3 AS "Talhao",
OBJ.CD_UPNIVEL1 || ' - ' || F.DE_UPNIVEL1 AS "Propriedade",
G.DE_FORNEC AS "Proprietario",
CASE
WHEN UP3.CD_TP_PROPR IN (1, 2, 3, 11) THEN
'Parceria'
WHEN UP3.CD_TP_PROPR IN (5, 8) THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 6 THEN
'Fornecedor'
WHEN UP3.CD_TP_PROPR = 14 THEN
'Parceria'
ELSE
'Verificar'
END AS "Participacao",
C.FG_OCORREN AS "Ocorrencia Cadastro",
C.DT_OCORREN AS "Data Ocorrencia",
B.DA_ESTAGIO AS "Estagio",
B.NO_CORTE AS "No. Corte",
D.DE_VARIED AS "Variedade",
E.DE_MATURAC AS "Ciclo Maturacao",
(OBJ.QT_AREA_PROD * 1) AS "Area",
(OBJ.QT_CANA_ENTR / 1000) AS "Toneladas"
FROM PIMSCS.HISTPREPRO OBJ,
PIMSCS.ESTAGIOS B,
PIMSCS.UPNIVEL3 UP3,
PIMSCS.SAFRUPNIV3 C,
PIMSCS.VARIEDADES D,
PIMSCS.TIPO_MATURAC E,
PIMSCS.UPNIVEL1 F,
PIMSCS.FORNECS G
WHERE OBJ.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ.CD_UNID_IND IN (15, 19)
AND OBJ.CD_ESTAGIO = B.CD_ESTAGIO
AND OBJ.CD_UPNIVEL1 = UP3.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = UP3.CD_UPNIVEL3
AND OBJ.CD_SAFRA = UP3.CD_SAFRA
AND OBJ.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND OBJ.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND OBJ.CD_SAFRA = C.CD_SAFRA
AND UP3.CD_VARIED = D.CD_VARIED
AND E.FG_MATURAC = D.FG_MATURAC
AND OBJ.CD_UPNIVEL1 = F.CD_UPNIVEL1
AND F.CD_FORNEC = G.CD_FORNEC
AND C.DT_OCORREN =
(SELECT MAX(D.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 D
WHERE D.CD_UPNIVEL1 = C.CD_UPNIVEL1
AND D.CD_UPNIVEL3 = C.CD_UPNIVEL3
AND D.CD_SAFRA = C.CD_SAFRA)
AND OBJ.CD_HIST =
(SELECT OBJ2.CD_HIST
FROM PIMSCS.HISTPREPRO OBJ2
WHERE OBJ2.CD_UPNIVEL1 = OBJ.CD_UPNIVEL1
AND OBJ2.CD_UPNIVEL3 = OBJ.CD_UPNIVEL3
AND OBJ2.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ2.CD_HIST = 'S'
AND OBJ2.CD_EMPRESA IN (15, 19)
AND OBJ2.DT_HISTORICO =
(SELECT MAX(OBJ3.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO OBJ3
WHERE OBJ3.CD_UPNIVEL1 =
OBJ.CD_UPNIVEL1
AND OBJ3.CD_UPNIVEL3 =
OBJ.CD_UPNIVEL3
AND OBJ3.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND OBJ3.CD_HIST = 'S'
AND OBJ3.CD_EMPRESA IN (15, 19)))) A,
(SELECT --ÁREA DE ORDEM DE CORTE DE MUDAS FECHADA B
A.CD_UPNIVEL1 AS "Fazenda",
A.CD_UPNIVEL3 AS "Talhao",
SUM(A.QT_AREA) AS "Area Fechada"
FROM PIMSCS.OCORTEMD_DE A
JOIN PIMSCS.OCORTEMD_HE B
ON A.NO_ORDEM = B.NO_ORDEM
WHERE A.CD_SAFRA =
(SELECT MAX(CD_SAFRA)
FROM PIMSCS.HISTPREPRO)
AND B.FG_SITUACAO = 'F'
GROUP BY A.CD_UPNIVEL1, A.CD_UPNIVEL3) B
WHERE a."Fazenda" = b."Fazenda"(+)
AND a."Talhao" = b."Talhao"(+)
AND a."Ocorrencia Cadastro" <> 'F'
AND (a."Area" - (CASE
WHEN b."Area Fechada" IS NULL THEN
0
ELSE
b."Area Fechada"
END)) > 0)) A
LEFT JOIN (SELECT --Ultima Estimativa do Talhão
A.CD_HIST "Cod. Historico",
CASE
WHEN A.CD_UNID_IND = 15 THEN
'USF'
ELSE
'URD'
END AS "Unidade",
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
A.DT_HISTORICO AS "Data",
A.QT_AREA_PROD AS "Area",
(A.QT_CANA_ENTR / 1000) AS "Toneladas",
A.QT_TCH AS "TCH"
FROM PIMSCS.HISTPREPRO A
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND A.CD_HIST = 'S'
AND A.QT_AREA_PROD <> 0
AND A.DT_HISTORICO =
(SELECT MAX(A2.DT_HISTORICO)
FROM PIMSCS.HISTPREPRO A2
WHERE A.CD_SAFRA = A2.CD_SAFRA
AND A.CD_UPNIVEL2 = A2.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = A2.CD_UPNIVEL3
AND A2.CD_HIST = 'S')) B
ON a."Fazenda" = b."Zona"
AND a."Talhao" = b."Talhao"
LEFT JOIN (SELECT --Distancia Cadastrada
A.CD_UPNIVEL1 AS "Zona",
A.CD_UPNIVEL3 AS "Talhao",
MAX(A.DS_TERRA) AS "Dist. Terra",
MAX(A.DS_ASFALTO) AS "Dist. Asfalto"
FROM PIMSCS.UPNIVEL3 A
LEFT JOIN PIMSCS.SAFRUPNIV3 B
ON A.CD_SAFRA = B.CD_SAFRA
AND A.CD_UPNIVEL1 = B.CD_UPNIVEL1
AND A.CD_UPNIVEL3 = B.CD_UPNIVEL3
WHERE A.CD_UNID_IND IN (15, 19)
AND A.CD_OCUP = 1
AND A.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.CD_SAFRA =
(SELECT MAX(CD_SAFRA) FROM PIMSCS.HISTPREPRO)
AND B.FG_OCORREN <> 'I'
AND B.DT_OCORREN =
(SELECT MAX(B2.DT_OCORREN)
FROM PIMSCS.SAFRUPNIV3 B2
WHERE B.CD_SAFRA = B2.CD_SAFRA
AND B.CD_UPNIVEL1 = B2.CD_UPNIVEL1
AND B.CD_UPNIVEL3 = B2.CD_UPNIVEL3)
GROUP BY A.CD_UPNIVEL1, A.CD_UPNIVEL3) C
ON a."Fazenda" = c."Zona"
AND a."Talhao" = c."Talhao") B
ON a."Chave" = b."Chave"
最佳答案
您可以将 sqlparse 与递归生成器函数一起使用:
import sqlparse, re
def get_tables(d):
f = False
for i in getattr(d, 'tokens', []):
if isinstance(i, sqlparse.sql.Token) and i.value.lower() == 'from':
f = True
elif isinstance(i, (sqlparse.sql.Identifier, sqlparse.sql.IdentifierList)) and f:
f = False
if not any(isinstance(x, sqlparse.sql.Parenthesis) or 'select' in x.value.lower() for x in getattr(i, 'tokens', [])):
fr = ''.join(str(j) for j in i if j.value not in {'as', '\n'})
for t in re.findall('(?:\w+\.\w+|\w+)\s+\w+|(?:\w+\.\w+|\w+)', fr):
yield {'table':(t1:=t.split())[0], 'alias':None if len(t1) < 2 else t1[-1]}
yield from get_tables(i)
print(list(get_tables(sqlparse.parse(s)[0])))
输出:
[{'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ'}, {'table': 'PIMSCS.ESTAGIOS', 'alias': 'B'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'UP3'}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'C'}, {'table': 'PIMSCS.VARIEDADES', 'alias': 'D'}, {'table': 'PIMSCS.TIPO_MATURAC', 'alias': 'E'}, {'table': 'PIMSCS.UPNIVEL1', 'alias': 'F'}, {'table': 'PIMSCS.FORNECS', 'alias': 'G'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'D'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ2'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ3'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.QUEIMA_HE', 'alias': 'QH'}, {'table': 'PIMSCS.QUEIMA_DE', 'alias': 'QD'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A2'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'B2'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ'}, {'table': 'PIMSCS.ESTAGIOS', 'alias': 'B'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'UP3'}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'C'}, {'table': 'PIMSCS.VARIEDADES', 'alias': 'D'}, {'table': 'PIMSCS.TIPO_MATURAC', 'alias': 'E'}, {'table': 'PIMSCS.UPNIVEL1', 'alias': 'F'}, {'table': 'PIMSCS.FORNECS', 'alias': 'G'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'D'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ2'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'OBJ3'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.OCORTEMD_DE', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': 'A2'}, {'table': 'PIMSCS.UPNIVEL3', 'alias': 'A'}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.HISTPREPRO', 'alias': None}, {'table': 'PIMSCS.SAFRUPNIV3', 'alias': 'B2'}]
关于用于从 SQL 语句中的 from 子句中提取表名的 python 库，，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/69684115/
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我有一个对象数组: var contacts = [ { "firstName": "Akira", "lastName": "Laine", "number"
int main() { int f=fun(); ... } int fun() { return 1; return 2; } 在上面的程序中，当从main函数中调用一个
我的项目中有很多 if 语句、嵌套 if 语句和 if-else 语句，我正在考虑将它们更改为 switch 语句。其中一些将具有嵌套的 switch 语句。我知道就编译而言，switch 语句通常更
Rem 语句 包含程序中的解释性注释。 Rem comment 或 ' comment comment 参数是需要包含的注释文本。在 Rem 关键字和 comment 之间应有一个空格。
ReDim 语句 在过程级中声明动态数组变量并分配或重新分配存储空间。 ReDim [Preserve] varname(subscripts) [, varname(subscripts)]
Randomize 语句 初始化随机数生成器。 Randomize [number] number 参数可以是任何有效的数值表达式。 说明 Randomize 使用 number 参数初始
Public 语句 定义公有变量并分配存储空间。在 Class 块中定义私有变量。 Public varname[([subscripts])][, varname[([subscripts])
Sub 语句 声明 Sub 过程的名称、参数以及构成其主体的代码。 [Public [Default]| Private] Sub name [( arglist )]
Set 语句 将对象引用赋给一个variable或property，或者将对象引用与事件关联。 Set objectvar = {objectexpression | New classname
我有这个代码块，有时第一个 if 语句先运行，有时第二个 if 语句先运行。我不确定为什么会这样，因为我认为 javascript 是同步的。 for (let i = 0; i < dataObje
这是一个 javascript 代码，我想把它写成这样:如果此人回答是，则回复“那很酷”，如果此人回答否，则回复“我会让你开心”，如果此人回答的问题包含"is"或“否”，请说“仅键入”是或否，没有任何
这是我的任务，我尝试仅使用简短的 if 语句来完成此任务，我得到的唯一错误是使用“(0.5<=ratio<2 )”，除此之外，构造正确吗？ Scanner scn = new Scanner(
有没有办法在 select 语句中使用 if 语句？ 我不能在这个中使用 Case 语句。实际上我正在使用 iReport 并且我有一个参数。我想要做的是，如果用户没有输入某个参数，它将选择所有实例。
这个问题在这里已经有了答案: 关闭 11 年前。 Possible Duplicate: If vs. Switch Speed 我将以 C++ 为例，但我要问的问题不是针对特定语言的。我的意思是一
Property Set 语句 在 Class 块中，声明名称、参数和代码，这些构成了将引用设置到对象的 Property 过程的主体。 [Public | Private] Pro
Property Let 语句 在 Class 块中，声明名称、参数和代码等，它们构成了赋值（设置）的 Property 过程的主体。 [Public | Private] Prop
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