for each row in(select * from student) loop for(select id,class_name from class where id=outer.class_id) loop if match then pass the row on to the next step if inner join and no match then discard the row if outer join and no match then set inner column values to null and pass ...
coordMaxWALsernder=0#max_wal_senders: needed to configure slave. If zero value is specified,#it is expected to supply this parameter explicitly by external files#specified in the following. If you don't configure slaves, leave this value to zero.coordMaxWALSenders=($coordMaxWALsernder $coord...
1:2 SqlFunc.IIF( == 1, 1, 2) if else 4.6.0.1 SqlFunc.IF( > 1) .Return() .ElseIF( == 1) .Return(st.SchoolId).End()IsNulll4.6.0.1 SqlFunc.IsNull(, 0)//如果是null则是0 获取数据库时间4.6.0.1 SqlFunc.GetDate(); 字符串相加函数,除了SqlServer外很多库对+不友好可以使用 SqlFu...
{1};\n", criteria.CurrentPage, criteria.PageSize);//PGSQL 自带OFFSET 功能,发现效率更高点vartableWhereStr = criteria.TableName;if(!string.IsNullOrEmpty(criteria.Condition)) { tableWhereStr +=" where "+ criteria.Condition; } sbSql.AppendFormat("select (select count(1) from {0}) RecordCount...
SELECT __tmp_create_user();DROP FUNCTION __tmp_create_user();ALTER USER postgres_exporter WITH PASSWORD 'password';ALTER USER postgres_exporter SET SEARCH_PATH TO postgres_exporter,pg_catalog;-- If deploying as non-superuser (for example in AWS RDS), uncomment the GRANT-- line below and ...
if __name__ == '__main__': reactor.callWhenRunning(main) reactor.run()代码解释 数据库连接配置：python DATABASE_CONFIG = { 'dbname': 'your_database_name', 'user': 'your_database_user', 'password': 'your_database_password', 'host': 'localhost', 'port': 5432, } 设...
可以使用公共表表达式 with t1 as ( select * from T where T.guid = someguid ) select * from t1 union all select * from T where T.default = 'true' and not exists (...
select act.ACTION_ID FROM ACTIONS act WHERE 1=1 and act.action_id IN iActionMasterIdList; BEGIN OPEN cur_action; LOOP FETCH cur_action INTO vActionMasterId; if not FOUND THEN return result_aid_list; end if; END LOOP; CLOSE cur_action; ...
SMgrRelation smgropen(RelFileNode rnode, BackendId backend) { RelFileNodeBackend brnode; SMgrRelation reln; bool found; if (SMgrRelationHash == NULL)//第一次调用该函数,先初始化hash { /* First time through: initialize the hash table */ HASHCTL ctl; ctl.keysize = sizeof(RelFileNodeBackend...
CREATETABLEIFNOTEXISTSimage_embeddings(image_pathTEXTPRIMARYKEY,embeddingsVECTOR(512)); 我们将使用 CLIP 模型为每个图像生成嵌入,并将它们保存到 Postgres 表中。并创建一些辅助函数来加载图像、生成嵌入并将它们插入到 Postgres 中。 frompydanticimportBaseModelfromtransformersimport(CLIPImageProcessor,CLIPModel,)MODE...